Jefferson City, Illinois Weather
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Weather Forecast for Jefferson City, Illinois : Jefferson County
Issued: 5:36 am CDT Jun 4, 2025 Latitude: 38.3786607 Longitude: -89.0434021 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Thursday Friday Saturday Sunday Monday Tuesday
50% chance of thunderstorms on Today 80% chance of thunderstorms on Tonight 70% chance of thunderstorms on Thursday 80% chance of thunderstorms on Friday 20% chance of thunderstorms on Saturday 10% chance of rain on Sunday 20% chance of thunderstorms on Monday Sunny on Tuesday
High: 84°F Low: 69°F High: 81°F High: 80°F High: 80°F High: 83°F High: 80°F High: 79°F
Low: 68°F Low: 65°F Low: 61°F Low: 65°F Low: 59°F  
Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Rain Thunderstorms Sunny
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Current Conditions at
CENTRALIA MUNICIPAL ARPT - (KENL)
73°
Cloudy
as of 5:35 AM CDST
Rel. Humidity: 73%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
8 MPH
250° West
Cloud Level(s): Scattered at 3300ft, Broken at 4100ft, Solid Overcast at 4800ft
Current Conditions at
MT VERNON - (KMVN)
72°
Clear
as of 4:56 AM CDST
Rel. Humidity: 78%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
8 MPH
190° South
Cloud Level(s): Clear
Current Conditions at
SALEM-LECKRONE ARPT - (KSLO)
75°
Cloudy
as of 5:35 AM CDST
Rel. Humidity: 69%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 29.98 in.
Flight Rule: VFR
Wind Data
10 MPH
230° Southwest
Cloud Level(s): Broken at 3300ft, Solid Overcast at 4100ft
50% chance of thunderstorms Today Today... A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 84. South southwest wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
80% chance of thunderstorms Tonight Tonight... Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 69. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%.
70% chance of thunderstorms Thursday Thursday... Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 81. Light and variable wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 70%.
30% chance of thunderstorms Thursday Night Thursday Night... A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. Calm wind.
80% chance of thunderstorms Friday Friday... Showers likely, then showers and possibly a thunderstorm after 10am. High near 80. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 80%.
30% chance of thunderstorms Friday Night Friday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
20% chance of thunderstorms Saturday Saturday... A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 80. Northwest wind 3 to 6 mph. Chance of precipitation is 20%.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 61. Light and variable wind.
10% chance of rain Sunday Sunday... A slight chance of showers after 1pm. Mostly sunny, with a high near 83. Calm wind becoming southwest around 6 mph in the morning.
10% chance of rain Sunday Night Sunday Night... A slight chance of showers after 1am. Mostly clear, with a low around 65. Light southwest wind.
20% chance of thunderstorms Monday Monday... A chance of showers and thunderstorms. Mostly sunny, with a high near 80. West northwest wind 5 to 8 mph.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 59. West northwest wind around 5 mph becoming calm in the evening.
Sunny on Tuesday Tuesday... Sunny, with a high near 79. Northwest wind 3 to 7 mph.
Sun Almanac for Jefferson City, Illinois
Sunrise: 05:33 AM
Sunset: 8:16 PM
Civil Sunrise:05:02 AM
Civil Sunset: 8:47 PM
Nautical Sunrise: 04:23 AM
Nautical Sunset: 9:27 PM
Astro Sunrise: 03:38 AM
Astro Sunset: 10:11 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.